Signal-alarm.



F. WINTER.

SIGNAL ALARM.

APPLIGATION FILED MABJS, 1912.

1,099,480, Patented June 9, 1914.

WITNESSES lNl/E/VTOR {9,21% mmm/c mum/z BY /3-/( M vylw ATTORNEYS IB EDERIC WINTER, OF NEW YORK, N. Y.

SIGNAL-ALARM.

Specification of Letters Patent.

Application filed March 16, 1912.

Patented June 9, 1914. Serial No. 684,272.

To all whom it may concern Be it known that I, FREDERIG WINTER, a citizen of the United States, and a resident of No. 833 Manhattan avenue, borough of Brooklyn, city of New York, State of New York, have invented certain new and useful Improvements in Signal-Alarms, of which the following is a specification. U

My invention relates to electric signal alarms in connection with glass Windows, glass bars, glass show cases, and the like,

wherein it is desirable that the objects may -tuation of an alarm at a central station, in

a manner usual with the ordinary electric alarm signals.

In the accompanying drawings Figure 1 is a front view of my signal alarm glass; Fig. 2 is a cross-section thereof taken on lines mw of Fi 1.

In these drawings 1 represents a plate of glass; 2 represents the wire conductor embedded therein; 3 represents the electric connection at one corner of the glass or window frame; 4 represents the electric connection at the other corner of the glass or window frame, the wires 2, 3, and 4 being connected in circuit for making the connection with any ordinary alarm.

While I have for urposes of illustration shown the electric atteries 5, 6 and the alarm 7 near the glass or window frame, it will, of course, be understood that these or equivalent parts, well-known in the art, may be used and that the signal terminus is usually located at any desired point near or at a distance from the glass or window.

The gist of my invention consists in embedding an electric conductor within the glass whereby perfect insulation is secured therefor and the same is completely protected against breakage of the continuity of circuit such as would otherwise result, for instance, from friction in cleaning the win (lows or accidental scratches upon a circuit established by superimposing the wire or conductor material upon the surface of the glass.

In the construction of my improved sig nal alarm as shown in the drawings the wire or conductor is a continuous strand forming vertical lines in the main body of the glass structure but bent at the top and bottom of the glass plate (as shown in Fig. 1), this continuous strand being embedded in the glass, preferably while the same is in a molten or viscous condition under excessive heat. It will be understood, however, that instead of making the wire or conductor in one continuous strand with bends at the top and bottom, it may be made in a plurality of strands connectedin series by connecting'the ends thereof, said strands being embedded as shown in the drawings. It is optional further to dispose the conducting medium within the body of the glass in any different design or to space the embedded conductor apart in any desired or preferred manner so long as it serves to establish a circuit disposed within and protected by the glass body and arranged to signal upon the breakage of the circuit through the breakage of the glass and the conductor embedded therein.

In order to render my signal alarm conductor extremely sensitive and to insure the breakage of the conductor wire or medium with the breakage of the glass, it is desirable that the wire be rendered extremely fragile and brittle so that the breakage of the glass will essentially result in the fracture of the circuit and the consequent signaling to the central or terminus station.

I claim:

An electrical alarm comprising in a unitary structure a single sheet of transparent glass having a conductive wire embedded therein between the opposite faces thereof, said wire being in intimate contact with the glass which completely surrounds it. and being essentially fragile and of such thinness as not appreciably to obstruct vision through In witness whereof, I have hereunto set said glass, the intimate relation between the my hand in the presence of two subscribing wire and the glass being so close that 21 witnesses.

rupture of the glass will result in a simulta- FREDERIC WINTER. neous rupture of said wire and means for Witnesses: connecting said wire in circuit with an EUGENE EBLE,

JOHN H. HILLIARD.

alarm. 

